Shower drain combination



NOV. 11, 1958 s w c 2,859,452

SHOWER DRAIN COMBINATION Filed April 25. 1955 Bay'amin J'eeuadc,

INVENTOR- H UEBNER, BEEHLER, WORREL 8 HERZIG,

dTTORNEYS.

vBY

Unite The present invention relates to a drain combination, andparticularly to a shower drain and sub-drain combination.

An important object of the invention is to provide a floor draincombination adapted for convenient installation and testing.

Another object is to provide a drain and sub-drain combination for thefloor of a shower having durable exposed parts which will not stain ordiscolor the shower floor with rust or oxidation products.

Additional objects will appear during the course of the followingdescription.

Broadly stated, the present invention is directed to a drain comprisingan internally threaded sub-drain for threaded engagement with a drainpipe, a generally cylindrical drain provided with tightening means forfastening the drain to the sub-drain, a corrosion resistant ring adaptedto be fastened over the upper end of the drain, and a strainer adaptedfor fastening over the upper surface of the ring to cover the mouth ofthe drain.

A more detailed description of a specific embodiment of the invention isgiven with reference to the drawing, wherein:

Figure l is a partially exploded perspective view showing the drain andsub-drain bolted together and showing the strainer, ring and test blankdetached from the drain and sub-drain assembly;

Figure 2 is a fragmentary sectional view showing in detail the mode offastening the strainer to the ring; and

Figure 3 is a cross-sectional elevational view showing the drain andsub-drain assembly complete.

The sub-drain 10 is internally threaded as at 11, for threadedengagement with a drain pipe (not shown). During installation of thedrain combination in a building under construction, the mouth of thesub-drain is kept closed by a test blank 12 externally threaded forthreaded engagement with the mouth of the sub-drain 10, as shown inFigure 3. A gasket 13 is employed with the test blank 12 to make agas-and-water-tight connection for testing purposes as required bybuilding codes in certain localities. The installed test blank alsoprevents dirt or fragments of building materials from falling into thedrain-pipe and trap and thus plugging the same. The test blank 12 isprovided with internal bosses 14 for wrench engagement for tightening orloosening the test blank in the mouth of the sub-drain 10. The subdrain10 is provided with an annular flange 16 around the mouth thereof havingan upwardly facing concave surface 17. The concave surface 17 in themounted combination at the bottom of a shower tightly engages the undersurface of the bottom of the shower. Bosses ate n t.

2,859,452 Patented Nov. '1"1, 1958 When installed in the bottom of ashower the undersurface 20 of flange 21 is tightly in engagement withthe upper surface of the shower bottom 40. The drain 19 is clampedtightly to the shower bottom and subdrain 10 by means of screws 22passing through holes in the flange 21 and threadedly engaged in tappedholes 15. Holes 23 through the flange 21 and the bottom of drain 19 areprovided. to permit passage of any seepage accumulation above theflanges 16 and 21 to flow through the holes and into the drain pipe byway of the sub-drain opening. Radially disposed internal bosses 24 areformed on the internal wall of drain 19 and are provided with tappedholes 26. Sub-drain 10 and drain 19 can be made of any desired materialbut usually are 18 are formed radially of the sub-drain 10 and aremolded from cast iron for reasons of economy.

Protecting ring 27 is made of a corrosion resistant material such asbrass, or stainless steel, for example, and is adapted to fit over theupper end of drain 19 as best shown in Figure 3. When installed, theupper surface 28 of ring 27 is flush with that of the shower floorindicated at 41. Installation in this manner hides the drain 19 fromview and prevents any showing of corroded or oxidized material resultingfrom attack of moisture and oxygen on the material composing drain 19.The ring 27, being made of oxidation or corrosion resistant material,retains its new finish and attractive appearance, which alone is visiblein the floor of the shower. Pairs of parallel internal arms 29 areformed radially of the ring 27 and are positioned to cooperate withscrews 31 engaging arms 29 and threadedly engaged in bosses 24 at tappedholes 26, to thus fasten ring 27 to the top of drain 19.

A strainer 32, made of a circular disc of oxidation and corrosionresistant material, such as brass or stainless steel, is fitted into aninternal flange 34 formed on the ring 27. Strainer 32 is provided withslits 33 to permit the drainage of water from the shower floor andprevent soap or other objects from passing into the drain pipe throughthe shower drain. Circular holes 35 are formed in the strainer 32 nearthe edge thereof and radially disposed bosses 36 are formed internallyof the ring 27. The bosses 36 are provided with tapped holes to engagescrews 37 passing through the holes 35 in strainer 32 and drawn tight tofasten the strainer over the mouth of the drain and flush with thesurface 28 of the ring 27.

It will be seen that the shower drain combination can be installed inthe bottom of the shower in a building under construction, and that testblank 12 and other parts of the shower drain combination are eitherflush with the floor of the shower, or below the surface thereof, sothat there are no projecting elements to come in the way of workmenduring their construction activities.

Obviously, many variations in the design and structural details of theshower drain combination of the invention will occur to one skilled inthe mechanical arts. The foregoing description is explanatory only, andis given primarily to illustrate a specific embodiment of the invention.Accordingly, it is understood that such changes and modifications in thedesign, details and structure of the shower drain combination of theinvention may be made within the scope of the appended claims withoutdeparting from the spirit of the invention.

What I claim is:

1. A shower drain combination, comprising: a generally cylindrical drainmember; an annular ring of corrosion-resistant metal overlying the upperedge of said drain member, said ring and said drain member in cludingvertically aligned inwardly directed boss means, said boss means havingaligned bores, the boss means of the drain member being threaded; screwmembers extending through said bores to secure said ring to said berssecuring said strainet'isolely to said ring member.

I 2. A shower..drainncombinationpas definedin claim'gi wliei'eins'saidhsecuring means comprise screw. members extending th'r'ougliapertureszimsaid strainer ands-being received inflinwardly. directedboss -means. on vsaid ling. 3. 'A' shower drain combinationasdefinedin'c1aim:2

wherein said ,ring member and said drain memberareiof 10 'a' 'recessonthe upper surface ofsaid ring membenand wherein said last-mentioned bossmeans are spacedbe- 10W said ,.upper a."surfaces.tomaccnmmodateaisaid.lastmentioned screw members.

References Cited in the file of this patent UNITED STATES PATENTS814,441 Gradwohli Mar. 6, 1906 1,918,509 Wilcox July 18, 1933 2,298,551;j Davisson Oct. 13, 1942 2,299,705 Svirsky Oct. 20, 1942 2,749,999Schmid June 12, 1956 2,780,303 Yavitch... Feb; 5, 1957

